It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 499 is not a prime number.
For example, 397 499 can be divided by 19: 397 499 / 19 = 20 921.
For 397 499 to be a prime number, it would have been required that 397 499 has only two divisors, i.e., itself and 1.
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397 499 is an odd number, because it is not evenly divisible by 2.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 397 499 is about 630.475.
Thus, the square root of 397 499 is not an integer, and therefore 397 499 is not a square number.
The square of a number (here 397 499) is the result of the product of this number (397 499) by itself (i.e., 397 499 × 397 499); the square of 397 499 is sometimes called "raising 397 499 to the power 2", or "397 499 squared".
The square of 397 499 is 158 005 455 001 because 397 499 × 397 499 = 397 4992 = 158 005 455 001.
As a consequence, 397 499 is the square root of 158 005 455 001.
The multiples of 397 499 are all integers evenly divisible by 397 499, that is all numbers such that the remainder of the division by 397 499 is zero. There are infinitely many multiples of 397 499. The smallest multiples of 397 499 are: